What is the reason why gold turns black when worn

Gold can also easily turn black when worn. This is a situation that many people who wear gold jewelry often encounter. After wearing gold for a long time, some stains will form on the surface, which will cause the metal to turn black. In addition, some moisture discharged by the human body, as well as some corrosive substances such as oil and salt, can also easily cause gold to become dull. In this case, the gold jewelry can be cleaned by certain methods. Let's take a look at this aspect.

Why does gold turn black when worn?

After wearing for a long time, the surface of the jewelry will wear out and stains will accumulate, causing the metal to turn black. After wearing gold jewelry for a long time, small scratches will inevitably appear on the surface. These scratches will accumulate fine dust in the air and oil secreted by the human body, causing the gold jewelry to turn black.

is corroded. In addition to water, oil, and salt, some harmful substances are also discharged from the pores of the human body, such as chlorides, lactic acid, urea, and ammonia. These substances react chemically with the silver and copper in gold jewelry to produce dark black silver chloride and copper sulfide, causing the jewelry to turn black and become dull.

Not pure gold jewelry. Nowadays, many gold jewelry is not made of pure gold, because pure gold jewelry is relatively soft and easy to deform. In order to prevent gold jewelry from deforming, jewelry manufacturers generally use alloys to make jewelry. Because other metals are added to gold, some easily oxidizable metals will cause gold jewelry to oxidize and turn black.

How to clean blackened gold

The first method is to use the toothpaste in our home for cleaning, because toothpaste has a high degree of cleaning and will not cause much harm to gold jewelry. Therefore, when our jewelry turns black, we can squeeze a little toothpaste on a soft-bristled brush, and gently brush the surface of the jewelry to make it clean again.

The second method is to use our rice washing water. As we all know, rice washing water is very effective for skin care, and it is also very effective for cleaning gold jewelry. This is because rice washing water contains bioalkali, which is a good detergent. Therefore, when our gold jewelry loses its luster, you might as well soak it in rice washing water and it will be as bright and clean as new.